Microstructure and piezoelectric properties of textured (Na0.84K0. 16)0.5Bi0.5TiO3 lead-free ceramics

被引：53

作者：

Gao Feng ^{[1
]}

Zhang Chang-Song ^{[1
]}

Liu Xiang-Chun ^{[1
]}

Cheng Li-Hong ^{[1
]}

Tian Chang-Sheng ^{[1
]}

机构：

[1] Northwestern Polytech Univ, Coll Mat Sci & Engn, Xian 710072, Peoples R China

来源：

JOURNAL OF THE EUROPEAN CERAMIC SOCIETY | 2007年 / 27卷 / 12期

基金：

中国国家自然科学基金;

关键词：

lead-free ceramics; tape casting; grain growth; piezoelectric properties;

D O I：

10.1016/j.jeurceramsoc.2007.01.015

中图分类号：

TQ174 [陶瓷工业]; TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Textured (Na,K)(0.5)Bi0.5TiO3 ceramics were fabricated by reactive-templated grain growth in combination with tape casting. The effects of sintering conditions on the grain orientation and the piezoelectric properties of the textured (Na,K)(0.5)Bi0.5TiO3 ceramics were investigated. The results show that the textured ceramics have microstructure with plated-like grains aligning in the direction parallel to the casting plane. The ceramics exhibit {h00} preferred orientation and the degree of orientation is larger than 0.7. The degree of grain orientation increases with the increasing sintering temperature. The textured ceramics show anisotropy dielectric and piezoelectric properties in the directions of parallel and perpendicular to the casting plane. The ceramics in the perpendicular direction exhibit better dielectric and piezoelectric properties than those of the nontextured ceramics with the same composition. The optimized sintering temperature is 1150 degrees C where the maximum d(33) of 134pC/N parallel to casting plane, the maximum k(31) of 0.31, and the maximum Q(m) of 154 in perpendicular direction were obtained. (c) 2007 Elsevier Ltd. All rights reserved.

引用

页码：3453 / 3458

页数：6

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